THE CIVIL HERC HAD AN EXTRA THROTTLE POSITION TO THE EARLIER MILITARY HERCS, NAMELY GROUND START. THE ENGINE TEMPS WERE HOTTER IN THE MILITARY T 56'S, 1080 VS 1077, ETC. A LOT OF THE CIVIL HERCS HAVE PARA DOORS EVEN ADDITIONAL ESCAPE HATCHES FWD OF THE WING. HYDRAULIC SYSTEMS ARE DUAL ON ALL FLIGHT CONTROL SYSTEMS, IF BOTH FAIL THEN MANUAL REVERSION, 365 MANUAL TURNS TO GET THE FLAPS FULLY DOWN, NOT SO HARD IN A PANIC. THE UNDER CARRIAGE MANUAL RELEASE MAY HAVE BEEN MODDED FROM THE FOUR BOLT RELEASE TO A SIMPLER COUPLING. STILL ONE OF THE SAFEST TO FLY.